Samantha had a board that was 6 ft. 8 in. long. She cut off a piece that was 2 ft. 10 in. long. How much board does she have left?

A. 4 ft. 10 in.
B. 4 ft. 2 in.
C. 3 ft. 2 in.
D. 3 ft. 10 in.

6ft 8in.- 2ft 10in. = 3ft. 10in.